Which of the following represent the correct combination without any exception?
Characteristic |
Class |
(1) Mammary gland; hair on body; pinnae; two pairs of limbs |
Mammalia |
(2) Mouth ventral; gills without operculum; skin with placoid scales; persistent notochord |
Chondrichthyes |
(3) Sucking and circular mouth; jaws absent; integument without scales; paired appendages |
Cyclostomata |
(4) Body coverd with feathers; skin moist and glandular; lungs with air sacs; fore limbs form wings |
Aves |
Which of the following animals is not viviparous?
1. Flying fox (bat)
2. Elephant
3. Platypus
4. Whale
Pick the odd pair out.
(1) Porifera : choanoflagellates
(2) Cnidaria : nematocysts
(3) Nematoda : pseudocoelom
(4) Mollusca : torsion
Chitin is a polysaccharide found in the exoskeleton of
(1) prawn
(2) insects
(3) crabs
(4) all of these
Which of these is not a coelenterate?
(1) Sea pen
(2) Sea fur
(3) Sea anemone
(4) Sea lily
Protonephridia are the excretory structures present in
(1) Planaria
(2) roundworm
(3) tapeworm
(4) Both 1 and 3
Carapace is present can be observed in
(1) Hemidactylus
(2) Testudo
(3) Naja
(4) Bufo
Closed circulatory system is not found in
(1) octopus
(2) tunicates
(3) echinoderms
(4) squids
Polyp phase is absent in the life cycle of:
(1) Hydra
(2) Hormiphora
(3) Pennatula
(4) Physalia
Which of the following is a fish?
(1) Flying fish
(2) Jelly fish
(3) Devil fish
(4) Star fish